[02/03] Object reference not set to an instance of an object Error

Hi... I am getting the following error:

Quote:

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An unhandled exception of type 'System.NullReferenceException' occurred in system.windows.forms.dll

Additional information: Object reference not set to an instance of an object.

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I am trying to copy a listview collection to an array. I want the array to be string but then I get another error if I try to copy listview.items to a string array

Code:

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Dim sourceArray() As Object
frm1.lstRight.Items.CopyTo(sourceArray, 0)

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You have to set/specify the size of the Object array first of all. You might be able to do something like this:

vb Code:

Dim sourceArray(Me.ListView1.Items.Count -1) As Object 'Creates correct size of array

Quote:

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Originally Posted by jeffnyc

Code:

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frm1.lstRight.Items.CopyTo(sourceArray, 0)

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Is frm1 the actual name of the form, or the current instance? If frm1 is the name of the form then that is your problem. Also, is this the line that throws the error?

Quote:

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Originally Posted by circuits2

Is frm1 the actual name of the form, or the current instance? If frm1 is the name of the form then that is your problem. Also, is this the line that throws the error?

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frm1 is the instance, i believe... fm1 is declared in a module and when form1 loads frm1 = me

i believe it is the way i am copying listview collection of objects to a standard array and in the way i declare it -

haven't tried stimbo's suggestion but also wondering if i need the NEW keyword anywhere

Ok, you need to change it to this:

Me.lstRight.Items.CopyTo(sourceArray, 0)